Tumbling mill



ful

Patented Oct. 12, 1926.

UNITED STATES GUSTAVE C. KOSIAN, OF ROCKFORD, ILLINOIS,

PATENT OFFCE.

ASSIGNOR TO ROCKFORD MALLEABLE TUMBLING MILL.

Application filed January 15, 1923i.

This invention relates to apparatus for cleaning castings and other objects by tumbling them, preferably packed with small abrading elements, such as shot, metal stars and the like, in a rotary barrel or drum.

Apparatus of this character and especially that used for tumbling medium and large size castings, operates under severe working conditions not only because of the heavy vibration and pounding set up by the tumbling action, but also because of the dust and line particles thrown olf and which unless positively controlled, are very destructive 'to the bearings and other parts. Tumbling apparatus heretofore used commercially has been unsatisfactory because its construction was inimical to efficient operation under the conditions mentioned. Consequently, such apparatus has been comparatively short lived and costly and inconvenient to maintain and operate.

The primary object of the present invention is to improve tumbling apparatus of the character described, especially in regard to the construction and mounting of the tumbling barrel, with the view to reducing frictional wear, lowering power consumption and cost of up-keep, and enabling more convenient operation.

As to the construction of the tumbling barrel, my invention contemplates a novel assembly of parts making up a trunnion type barrel including end heads to which are detachably secured trunnions, drum plates, supplemental heads and a gear ring. Other features and inherent advantages pertaining to the tumbling barrel will be described hereinafter.

Regarding the mounting, I have aimed to provide an improved journal means for revoluhly supporting heavy tumbling barrels and for lubricating and protecting them from wear. I have also provided a novel means whereby the bearings will be selfaligning.

.Another object is to improve the mounting of the tumbling barrel in connection with the gear drive for obtaining easier starting and less wear on the parts.

Still another object' is to provide a tumbling .mill which will be durable, thoroughly practical for commercial purposes,

Serial No. 612,678.

Fig. 2 is a transverse sectional view taken substantially on the line 2-2 of Fig. 1 with part of the tumbling barrel in section;

Figs. 3, l and 5 are top, side and bottom views respectively, of one of the roller saddles removed;

Figs. 6 and 7 are sections taken substantially on the line 6-6 and 7 7, respectively, of Fig. 2; and

Fig. 8 is a section taken on the line 8 8 of Fig. 7.

The tumbling barrel is composed of the Y following parts designated generally, namely, end heads or plates 11 and 12, trunnions 18 and 14, supplemental heads 15 and 16, a gear ring 17 and drum plates 18, one of which 18 constitutes a charging door. Each of said heads has cast integrally therewith a central opening 19, an annular flange 21 on its outer side, a peripheral flange 22 and radial ribs 23 on its inner side. lhe head 11 has pads 2a machined to provide concentric shoulders 25 upon which are seated complemental shoulders of the gear ring 17. Said gear ring is secured to the head by bolts 26. Each trunnion, seated on the flange 21 of its respective head, has an annular flange 27 secured by bolts 28 to said head and has a hollow center providing an air passage communicating with the opening 19 in said head. Each supplemental head 15 suitably perforated throughout, is clamped to the ribs 23 of its respective head bv bolts 29, the supplemental head being of less diameter than the internal diameter of the head flange 22 so as to afford an annular air space for the passage of sand and waste material as will be described later. The drum plates 18, removably secured to the head flanges 22 by bolts 31, each have a flange 32 along oneof its longitudinal edges overlapping the edge ai?. the adjoining plate, shan-fn in thus substantially closing the drum against leakage of dirt and admission of air. All ot' the principal parts making up' the barrel structure are preferably in the form of heavy castings, which require little or no machining and are veryv desirable for the work fintended for a tumbling mill. This construction permits removal of any of the drum plates, and in tact, any of the tumblingibarrel parts, without removing the trunnions from their journal mountings; This isespe-` cially desirable in the event that replacement of any of the parts' is necessary.

-The drum plate 18 whichl employ for the charging door is preferably quickly-removable and may' be secured inclosed position by'suitable means, such' for example as a series of. heavy spring clamps' 33, pivotally' connectedl 'at 3'4 to anv adjoining drum plate andrhaving a seat 35 in its' opposite end adapted to be sprung beneath' and to bear againstY a' bolt 36 carried by *thel plate 18. By springing the outer end' ot each clamp 33 inwardly, thebolt 36 may be withdrawn, permitting said clamp toA be swung outwardly, so asv to release' the charging door,l whichl in' the present instance V will be bodily removedv when loading' and unloading the ltumbling barrel.

Each trunnion is' revolubly supported in a journal bearing consisting oi' a' pair ofV rollers 37 -in turn mounted througha the intermediary of 'anti-friction' rollers 4848 on shafts 39 fixed to the arm I410ir asaddle bracket designated generally by 42', The roller saddle brackets for the trunn-io'n'sv 13 vand 14 are supported upon and within' lower journal box or casing sections, designated generally by 43 and 44, respectively'. Each lower casing section, open at its top, constitutes a lubricant reservoir, and is shaped to provide an inwardly dished seat 45 for the reception of the. truste-conical bottom 46 of its respective saddle bracket, arid to pro` vide dianietrieally opposed lugs 47'ad'apted to prevent lateral displacement otfjth'e saddle bracket -and to bear lateral thrust imposed on the tumbling barrel at times lduring the operation as will be explained later. The roller saddle brackets, it will be observed, merely rest in the seats 45 and are tree Yto swivel. oscillate or tilt-on their respective mountings for allowing their rollers to'A come into alignment with the trunnions. In other Words, the mounting permits `Seli-alignment' ot the rollers, and allows'this alignment to `manites'tthat wher'il the lever 59 is sw closes the open top of and is bolted to each bottom casing section 43 and 44. rlhe meet- Ving edges of these casino. sectionaand likewise' their edges circuiiscribing the trunn-ions at the inner and outer ends thereof, are packed, preferably bytelt pack-ing' 49, held in grooves 51 in said casing sections. It will thus be seen that each trunnion bearingl is completely inclosed and housed in a casing and that all joints and clearance openii'igs'are' thoroughly packed so as to pensive mounting' for heavy tumbling-barrels. ItI will be observed that thetumb'ling barrel isbalanced upon land'` between thev rollers 37 and that by excluding alll foreign matter, providing self-contained lubrication and preventingexcessive and unequal lateral strains on the bearings' when shifting' the tumbling barrel, thel m'ountin'gs will function very eitc'iently. Furthermore, theser inountings reduce to a minimum theY power consumption for driving. the'tumbling barrel. Y A

The lowercasing sections 43 andr 44 are mountedv resoectively on the flat top surfaces et frame standards 52 and 53, the casing section 43 with capacity to slide lengthwise'on its traine standard,"andthecasing .section 44 to oscilla'te about a vertical axis. To this end the casing section 43lias depending guide lugs 5 '4 over-reaching the sides et its' standard 52, and the casing section 44jhas a depending annular bossv 55 iitting in a recess in its standard 53.' This movement of the tumbling barrel is desired for bringing its gear 17 into and out oit mesh with a driving 'pinion 56 'fixed to a. drive shaft 57, which is jouina'led in suitable bearings 5S mounted on the franiestandards".

Means is provided for shitting the tunibi ling barrel into and` out of gear comprising .a hand lever 59 having trunniens V61 journaled in open-top bearing seats 62 (in spaced lugs (33 reachingforwardly 'from the frame standards v52. `On the-.outer end ot each trunni'on 61 is formed aneceentric arm vi4 located in a vertical slot 05 in a lug G6V integral" with and projecting torvv'ardly fromthelower casing section 43. will be forwardly and Adownwardly iioiiitheiposition shown in Fig. '2, the casing section 43 will be V.slid forwardly on the frame standard' 52, thereby shitting the tumbling barv i'el about the vertical axis of the lug orpivot Ypin 55 andiinmeshing thegears 17 and 56.

Reversal ofy this l.operation establishes the driving'con'neetion. This construction is'eX- ceptionally simple and durable and permits easy assembly oi parts, it being noted that the lever 59 is retained in position by the lugs G6 overlying the trunnion 61, as shown in Figs. 1 and 2.

To the outer end ot one of the trunnions, in this case the trunnion 13, is applied a suction connection in the form of a casing 67. This easing secured by bolts 68 to the casing 43, has a top suction opening 69 and a bottom discharge opening 71, to the former o1' which is connected a suction pipe 72. A packing 70 closes the joint between the easing 67 and the trunnion 13. A gate or closure 73 pivoted at 74 on the easing 67 and having a weighted end 75 closes the opening 71.

During operation the suction Yfrom the pipe 72 draws fresh air into the tumbling barrel through the hollow trunnion 14, and this air passing lengthwise through said barrel removes the tine dust and other waste particles `from the contents of the barrel and carries them through the perforated supplemental head 15, the hollow trunnion 13 and into the casing 67. This casing constitutes a trap into which the heavier particles tall. l'leavier particles ot sand, scale, etc., not picked up by the suction, work through the pertorations in and around the supplemental head at the drive end of the barrel, into the space between the head 11 and said supplemental head and will be guided by the ribs 23 into the trunnion opening and there drawn into the. trap by suction. When the waste material accumulated in the trap on the bottom closure 7 3 overcomes the weight 75, the door will open allowing, such material to discharge. Said weight automatically closes the door.

1t is believed that the foregoing conveys a clear understanding of the objects prefaced above, and while I have illustrated but a single working embodiment, it should be understood that changes might be made in details ot construction without departing -trom the spirit and scope ot the invention as expressed in the appended claims.

l claim 1. 1n combination, a hollow rotary tumbler body having a trunnion at each end, a journal for each trunnion arranged for universal self-adjustment relative to said trunnion in ditferent positions thereof, mov-able means supporting said journals, a gear iXed to said body, a driving' gear on a fixed axis, and means for shifting said movable means and the rotary body for moving its gear into and out ot mesh with said driving gear.

2. 1n combination, a hollow rotary tumbler body having a trunnion at each end, a seit-adjusting universally shittable journal tor each trunnion, a gear iixed to one end ot said body, a driving gear on a fixed axis,

and means for shifting said rotary body and its journals about an axis remote from the gear end of the body and moving its gear into and out ol' mesh with said driving gear.

8. 1n a tumbling mill, a tumbling barrel having a head plate formed with an integral peripheral iiange, a central annular flange, gear pads on its outer side and radially dis posed ribs on its inner side, drum plates bolted to said peripheral flange, a trunnion fitting said central flange, a gear ring seated on said pads, a supplemental head on said ribs, and bolts for securing said trunnion, gear ring and supplemental head to the head plate.

4. 1n a tumbling mill, a tumbling barrel comprising end heads, one of which has a central suction opening, drum plates connecting the heads, a perforated supplemental head supported at the inner side ot said suction opening head, radially disposed ribs between said heads for guiding material toufard said opening, a suction pipe connected with said opening, and means revolubly supporting the tumbling barrel.

5. A tumbling mill comprising a pair of trame standards elongated transversely oi the mill and each having a comparatively flat top, a casing mounted on the top of each standard, one to oscillate about a vertical axis and the other to slide lengthwise upon its standard, a tumbling barrel interposed between the standards and having trunnions journaled in said casings, a gear on one end of the barrel, a driving pinion mounted on the standard carrying the sliding casing, and a lever mounted on the last mentioned standard and connected with its casing for moving the latter on its standard for bringing the gear into and out of mesh with said pinion.

6. A tumbling mill comprising a pair ot trame elements extending transversely relative to the mill, and each having a comparatively tlat top, a casing` mounted on the top of each, one to oscillate about a vertical axis on a pivot mounted in the one trame element and the other to slide lengthwise on the other frame element, said last mentioned casing having means for guiding the same on said trame element against displacement therefrom, a tumbling barrel mounted between the frame elements having trunnions journaled in said easings on seliad- ,justing universally shittable bearings therein, a gear on one end of the baii'rel, a driving pinion mounted on the frame element carrying the sliding casing, and means mounted on the last-mentioned trarne element and con* nected with the casing thereon for moving the same and bringing the aforementioned gear into and out ot mesh with the aforementioned pinion.

GUSTAVE C, KOSIAN, 

